Metal saw and trimmer.



K. HOEPENER. METAL SAW AND TRIMMER. APPLICATION FILED DBO. 4, 1912.

a SHEETSSAHBET 1.

1,082,521. Patented 1390.30, 1913.

lllllllllll lg mnm-uu l IIIII/IIIIIII n n-l K. HOEPFNER. METAL SAW ANDTRIMMER. APPLICATION FILED DBO. 4, 1912.

3 SHEETS-SHEET 2.

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Patented Dec. 30, 1913.

K. HOEPPNER. METAL SAW AND TRIMMER. APPLICATION FILED DEC. 4, 1912.

3 SHEETSSHEET 3.

Patented Dec. 30, 1913.

v w v: Ky [11'' KARL HQEPFNER, or DAYTON, oHIo.

METAL sAw AND TRIMMER.

' Specification of Letters Patent.

Patented Dec. 30,

Application filed December 4,1912. Serial No. 734,870.

To all whom it may concern Be it known that I, KARL HQEPFNER, a

subject of the Emperor of Germany, residing at Dayton, in the county of.Montgomery and State of Ohio, have invented certain new and usefulImprovements in Metal Saws and Trimmers; and I do declare the followingto be a full, clear, and exact description of the inventiom'such as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and to theletters and figures of reference marked thereon, which orm a part ofthis specification.

This invention relates to improvements in combined metal-saws andtrimmers es? pecially adapted for sawing and trimming electrotypes. Itis, however, adapted for sawing other metallic and hard materials.

The object of the inventionis to provide means for instantaneouslyelevating and lowering the saw relatively to the table.

Heretofore, means have been provided for elevating and lowering thetable relatively to the saw byfa "comparatively slow-acting mechanism.This has been found objectionable owing to the time lost in operatingthe saw. For example, in cutting a piece of material of such a size thatthe saw arbor or mandrel will strike the edge of said mat-erial beforethe out is finished, it is 'im-' possible to complete the work unlessthe.

mandrel is lowered .so that it passes underneath the work. Heretofore,this has been done by a slow-moving element, such as a screwthreadedinto a nut which necessitates several rotations of the screwbefore the saw. can lowered to the desired position.

The weight-of the table must be borne by the screw in this operationwhich is'objectionable and addsfto the'inconvenience and slowness of theoperation. The present invent-ion overcomes theseobjections in that itprovides means for obtaining a much quicker adjustment of the sawrelative to the table and does not impose upon-the operator theweight-of the table in adjusting the same. In the present. invention.the screw acts "as a rack in connection with a segment gear which inturn isQoperated by a lever to obtain the quicker adjustment." Inobtaining the finer or more delicate-adjustments,

the screw operates in connection with a nut as will be herelnafter fullydescrlbed.

Referrlng in general terms to the accompan'ying drawings, Figure 1 is afront ele-.

vation of a. saw embodying'my invention; Flg. 2 1s a side elevationthereof; F1 3 1s a section on the hue a-a of Fig. 2; 1g. 4

is a top plan view of the table showing the gage mounted thereon; Fig. 5is a vertical longitudinal sectional view through the mandrel. Fig. 6 isa detail sectional view of the platen-controlling lever. Fig. 7 is adetail sectional view of themicrometer adjustment for the gage.

Referring more particularly to said drawings, 1 represents a standardprovided with a base 2 and guides 3. Mounted in the guides 3 is a frame1 provided with horizontal .bearings'5 and a downward extension 6 whichreceives a lower bracket 7 upon which a motor 8 is mounted. Mounted inthe bearings 5 is a mandrel 9 provided with a head 10 which receives aretary saw 11. This is" more clearly seen in Fig. 5. The mandrel 9 isprovidedwith a pulley 12 which is connected by a belt 13 with the motor.The frame 1, the mandrel "9, the motor 8, and the saw 11 are verticallymovable in the v guides 3, and are'moved by.

and held in a set position-bythe following 1 means: The said frame 4 hasalined vertical bearings 14. which receive a rack or ad.-

justing screw 15. In engagement with said screw 15 is a worm segment 16adjusting journaled on a stud 17 mounted in a pro ection 18 extendingfrom the standard se ent' 16 is oscillated by an arm 19 proa spring 21.'The handle 20 is provided when it is desired to elevate said saw, the wi handle 20 is moved longitudinally on the arm 19 and is then depresseduntil the spring-21 within said handle moves the conical portion-24 intothe lower recess 22. i

Mounted on the-upper e'nd'of the standard 1 and secured by lugs 25 is astationary table-26 upon which is mounted a slidmg 1a The l '90 videdwith a sliding handle 2Ov controlled by 'with a conical 'portion 211adapted to rest in upper andjlower recesses .22 in the flange table 27.When the conical port-ion 24 of the handle 20 rests in the upper recess22, the mandrel 9 lies below the tables 26 and 27, and when said conicalportion rests in the lower recess 22, the'said mandrel lies above thetable. To obtain a fineor delicate adjustment between the table and saw,for example, when the saw is in either an upper or lower'position, theadjusting screw 15 is provided with a hand wheel 28 by which it may berotated. When rotated, the worm segment 16 will be held stationary bythe segment 21 and will act as a nut for the motor 8, mandrel 9 and saw11. The hand wheel 28 is provided with a conical flange 29 which-iscalibrated to facilitate adjust ment.

To balance the frame 4 and the parts carried thereby, said frame isprovided with lugs 30 which receive a roller 31. The said roller 31 ismounted on one end of a lever- 32 pivoted at 34 to the standard 1, whilethe opposite end carries an adjustable weight 35. The weight 35compensates or balances the weight of the saw-carrying parts to anyextent which relieves the operator and makes the device sensitive.That-is to say, the position of the weight may be such as to relieve thesaw-carrying parts entirely, so that the operator is relieved of the.Weight of the saw-carrying parts in elevating the same.

To maintain the work in position upon the table 27 when being acted uponby the saw, ,the following gage is provided: Mounted on the slidingtable 27 and pivoted about a point 36 is a guide 37 provided with aflange 38 and a rack 39. Slidingly mounted on the guide 37 is a gage 40provided with an eccentric clamp 41 adapted to engage the flange 38. Theflange 38 is provided with calibrations to facilitate the positioning ofthe gage 40. A micrometer adjustment is also provided to permit the gageto be set intermediate of the calibrations on the flang'e 38.' The headof said gage 40 is provided with a pocket which receives a nut 42 inengagement with the rack 39. Extending through the nut 42 is a screw 43,the stem 44 of which is journaled in the head of the gage and isprovided with a thumb head 45 having the well known micrometercalibrations thereon. The head of the gage 40 is provided with fingermembers 46 by means of which said gage may be elevated and slid alongthe guide. The work to be acted upon by the saw rests in the angleformed by the guide 37 and-the gage. When said gage is in a normalposition, the guide 37 lies at a right angleto the saw while'the gagelies parallel with the same. When it is desired to operate on the workat an angle, the uide 37 and the gage is swung around the point 36 edgesat the desired angle.

standard angles of thirty and forty-five de- -grees, the-table 27 isprovided with suitable positioned openings 49, and which are adapted toreceive a pin '50 mounted in the guide 37. I, j

To bevel the edges of electrotypes, etc., the following device isprovided: Mounted in the saw head 10 is a cutter head 51 provided withcutters 60 having their cutting (See Fig. 5). The head 51 is mountedon'a shaft 52 located within the ;mandrel 9. The shaft 52 is splined tothe mandrel by means of a key 54 and is provided with acollar 55 whichlies within an adjustable head 56. The said head 56'is provided with ahand wheel 57 and screw-threads 58. The said head 56 en- 'When' the handwheel 57 is rotated, relative to the mandrel, the shaft'52 is movedlongitudinally relative to said mandrel and the cutters 60 may beprojected past the face of the saw when they will be in a position toengage the edge of the electrotype.

Without limiting myself to the precise arrangement shown and describedwhich may be varied within the scope of the claims, I claim,

1. In a saw of the type specified, the combination with a table, of alongitudinally adjustable frame, a saw-mandrel journaled in said frame,and a motor supported on said frame and connected with said mandrel,means comprising a screw and segment gear for shifting said framevertically to bring the saw to positions above or below the table, andmeans. for adjusting the saw independent-ly of the movement given itthrough the movement of the-frame, said last named means comprising ahand-operative connectfiioi with said screw, substantially as speci- 2.In a saw of the type specified, the combination with a table, of avertically lon-' gitudinally adjustable frame, a saw-mandrel journaledin said frame, a motor supported on said frame and connected with saidmandrel, an adjusting screw mounted on said frame, a segmental gearengaging said screw,

.. a handle for operating said segmental gear to raise or lower saidframe, and a counterbalan'cing weight connected with said frame,substantially as described.

3. In a saw of the type specified, the

combination with a table, of a vertically longitudinally adjustableframe, a saw mandrel and a motor supported on said frame, a screwmounted on said frame for obtaining a finer adjustment of the sawrelative to the table, a segmental gear engaging said screw to raise orlower the saw relatively to the table, a lever.for operating said segmental gear, means 'on said screw for op- 10 said gage and engaging saidrack, and a said segmental screw inelosed in said gage and engaging saidnut and by means of which the gage may be adjusted on said guide.

In testimony whereof I afliX my signature, in presence of two witnesses.

KARL HOEPFNER.

Witnesses MELLIE GALLOWAY, MATTHEW SIEBLER.

